Open AccessImproved voltage scanning method for maximum power point under partial shadow conditions
Author(s) -
Wenfang Ding,
Shiqi Yu
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/768/4/042020
Subject(s) - maxima and minima , maximum power principle , point (geometry) , voltage , shadow (psychology) , algorithm , matlab , power (physics) , power factor , maximum power point tracking , mathematics , computer science , control theory (sociology) , engineering , artificial intelligence , physics , psychology , mathematical analysis , geometry , electrical engineering , control (management) , quantum mechanics , inverter , psychotherapist , operating system
This paper proposes a novel maximum power point tracking (MPPT) algorithm with global search. The algorithm combines global voltage sweep and incremental conductance method, and introduces a Judging factor as a criterion for global voltage scanning. The Judging factor is compared with the threshold and the scan step size is selected based on the result. Take a large step when far from the peak. When approaches the peak, uses the incremental conductance method to find the local extrema and store it, then continues scanning. When the output power is close to zero, the scan is complete, Comparing all local extrema points then the global maximum power point will be found by this algorithm. Matlab simulation results show that the algorithm can find the global maximum and the search speed is fast.